2017ApJ...844..116K

Query : 2017ApJ...844..116K

2017ApJ...844..116K - Astrophys. J., 844, 116-116 (2017/August-1)

Numerical simulations of collisional cascades at the Roche limits of white dwarf stars.

KENYON S.J. and BROMLEY B.C.

Abstract (from CDS):

We consider the long-term collisional and dynamical evolution of solid material orbiting in a narrow annulus near the Roche limit of a white dwarf. With orbital velocities of 300 km s^–1, systems of solids with initial eccentricity e 10^–3 generate a collisional cascade where objects with radii r 100–300 km are ground to dust. This process converts 1-100 km asteroids into 1 µm particles in 10²-10⁶ yr. Throughout this evolution, the swarm maintains an initially large vertical scale height H. Adding solids at a rate {dot}M enables the system to find an equilibrium where the mass in solids is roughly constant. This equilibrium depends on {dot}M and r₀, the radius of the largest solid added to the swarm. When r₀ <= 10 km, this equilibrium is stable. For larger r₀, the mass oscillates between high and low states; the fraction of time spent in high states ranges from 100% for large {dot}M to much less than 1% for small {dot}M. During high states, the stellar luminosity reprocessed by the solids is comparable to the excess infrared emission observed in many metallic line white dwarfs.

Journal keyword(s): circumstellar matter - planetary systems - planets and satellites: formation - planets and satellites: physical evolution - planets and satellites: rings - white dwarfs - white dwarfs

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	LBQS 1145+0145	WD*	11 48 33.6297189672	+01 28 59.420446860						DB	216	0

Query : 2017ApJ...844..116K

Basic data :

LBQS 1145+0145 -- White Dwarf

* (1992ApJS,EPIC,...), WD* (1992ApJS,WD), WD? (2018MNRAS), QSO (LBQS), EB* (2016AJ), Opt (SDSS)

11 48 33.6297189672 +01 28 59.420446860 (Optical) [ 0.0754 0.0600 90 ] A 2020yCat.1350....0G

11 45 59.9170490692 +01 45 40.291033773 [ 0.0754 0.0600 90 ]

269.8500485730851 +60.2522309712248 [ 0.0754 0.0600 90 ]

-43.664 -4.027 [0.105 0.075 90] A 2020yCat.1350....0G

6.8534 [0.0907] A 2020yCat.1350....0G

DB D 1992ApJS...78..409B

G 17.145735 [0.003365] C 2020yCat.1350....0G

u (AB) 16.832 [0.007] C 2008ApJS..175..297A

g (AB) 16.985 [0.004] C 2008ApJS..175..297A

r (AB) 17.288 [0.005] C 2008ApJS..175..297A

i (AB) 17.559 [0.007] C 2008ApJS..175..297A

z (AB) 17.822 [0.023] C 2008ApJS..175..297A

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`WD 1145+017`	`HE 1145+0145`	`SDSS J114833.62+012859.4`	`Gaia DR3 3796414192429498880`
`EPIC 201563164`	`LBQS 1145+0145`	`Gaia DR2 3796414192429498880`

References (216 between 1850 and 2026) (Total 216)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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Data at NED - NASA/IPAC Extragalactic Database : LBQS 1145+0145

Link by name to the catalogue in VizieR :

WD 1145+017 LBQS 1145+0145 SDSS J114833.62+012859.4 Gaia DR2 3796414192429498880 Gaia DR3 3796414192429498880

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